1253730239 has 2 divisors, whose sum is σ = 1253730240. Its totient is φ = 1253730238.

The previous prime is 1253730223. The next prime is 1253730293. The reversal of 1253730239 is 9320373521.

Together with next prime (1253730293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (9320373521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1253730239 - 2⁴ = 1253730223 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1253730199 and 1253730208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253730209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626865119 + 626865120.

It is an arithmetic number, because the mean of its divisors is an integer number (626865120).

Almost surely, 2^1253730239 is an apocalyptic number.

1253730239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253730239 is an equidigital number, since it uses as much as digits as its factorization.

1253730239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 1253730239 is about 35408.0533071221. The cubic root of 1253730239 is about 1078.2878217258.

The spelling of 1253730239 in words is "one billion, two hundred fifty-three million, seven hundred thirty thousand, two hundred thirty-nine".